FCS II Channel Islands Upright Performance Core Quad Rear Fins

Are you looking for the ultimate upgrade for your quad setup? The FCS II CI Upright Quad Rear fins are the result of an exclusive collaboration with the legendary Channel Islands Surfboards. These rear fins (set of 2) were designed by shaper Britt Merrick to work perfectly with the upright CI side fins. They offer the perfect balance between control, stability, and the ability to make incredibly tight, short turns.

Speed, Control, and Stability with the 80/20 Foil

Thanks to their neutral-raked profile, these fins immediately give you a familiar and stable feel. What truly makes this set unique is the 80/20 foil (fin shape). This specific hydrodynamic shape optimizes water flow, ensuring exceptional directional control and extra confidence when pushing hard through turns. Ideal for surfers who want to fine-tune their quad setup for maximum start-up speed.

Premium Performance Core (PC) Construction

The fins are made from high-quality Performance Core (PC) material. A layered resin molding process creates a progressive flex that builds from a stiff base to a more flexible tip. This allows you to effortlessly maintain your drive and hold during powerful turns, while the material remains super light and performs in all imaginable conditions.

Ideal Conditions & Board Types:

• Ideal Waves: Powerful, hollow, and steep waves; excellent for punchy beach breaks where you need immediate starting speed.

• Surfboard Type: Specifically designed for the FCS II Fin System. Ideal for performance boards with deep concaves and moderate to extreme rocker.

• Fin Family (Carver / Quad): Focused on stability and flowing power, combined with the characteristic speed of a quad setup.